package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * Created with IntelliJ IDEA.
 * User: zjz
 * Date: 2022/07/25 18:52
 * Description:
 * Version: V1.0
 */
@RestController
@RequestMapping("/dish")
@Slf4j
public class DishController {

    @Autowired
    //菜品Service
    private DishService dishService;

    @Autowired
    //口味Service
    private DishFlavorService dishFlavorService;

    @Autowired
    //分类Service
    private CategoryService categoryService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 新增菜品
     *
     * @param dishDto
     * @return
     */
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info("dishDto = {}", dishDto);

        dishService.saveWithFlavor(dishDto);


        //清理所有的菜品缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);


        return R.success("新增菜品成功");
    }

    /**
     * 菜品信息分页查询
     *
     * @param page
     * @param pageSize
     * @param name
     * @return
     */
    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {

        //构造分页构造器
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        //DishDto里面有categoryName分类名字属性
        Page<DishDto> dishDtoPage = new Page<>();
        //构造条件构造器
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加过滤条件
        queryWrapper.like(name != null, Dish::getName, name);
        //添加排序条件
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo, queryWrapper);

        //对象拷贝
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");

        List<Dish> records = pageInfo.getRecords();

        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类Id

            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();

                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());

        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);
    }


    /**
     * 根据Id查询菜品信息和对应的口味信息
     *
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> getById(@PathVariable Long id) {

        DishDto dishDto = dishService.getByIdWithFlavor(id);

        return R.success(dishDto);
    }


    /**
     * 修改菜品
     *
     * @param dishDto
     * @return
     */
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {

        dishService.updateWithFlavor(dishDto);

        //清理所有的菜品缓存数据
//        Set keys = redisTemplate.keys("dish_*");
//        redisTemplate.delete(keys);

        //清理某个分类下的菜品缓存数据
        String key = "dish_" + dishDto.getCategoryId() + "_1";
        redisTemplate.delete(key);

        return R.success("修改菜品成功");
    }


    /**
     * 根据条件查询对应的菜品数据
     *
     * @param dish
     * @return
     */
//    @GetMapping("/list")
//    public R<List<Dish>> list(Dish dish){
//
//        //构建查询条件对象
//        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
//        //添加查询条件
//        queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
//        //添加查询状态为1(起售)的菜品
//        queryWrapper.eq(Dish::getStatus,1);
//        //添加排序条件
//        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
//        //查询
//        List<Dish> list = dishService.list(queryWrapper);
//
//        return R.success(list);
//    }
    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {

        List<DishDto> dishDtoList = null;

        //动态构造key
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();

        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);

        //如果存在，直接返回
        if (dishDtoList != null){
            return R.success(dishDtoList);
        }

        //如果不存在，需要查询数据库

        //构建查询条件对象
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        //添加查询条件
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加查询状态为1(起售)的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        //查询
        List<Dish> list = dishService.list(queryWrapper);

        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();

            BeanUtils.copyProperties(item, dishDto);

            Long categoryId = item.getCategoryId();//分类Id

            Category category = categoryService.getById(categoryId);

            if (category != null) {
                String categoryName = category.getName();

                dishDto.setCategoryName(categoryName);
            }

            BeanUtils.copyProperties(item, dishDto);

            //菜品id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());

        //将查询到的菜品数据缓存到redis
        redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }


    //todo 删除、停售、批量删除、批量停售、批量起售


}
